Valve, please, bring back Dota VR Hub. There are not many of us, but it would be a good touch, especially for watching DPC matches. Anyway it was only optional to download,
Inside the 'DOTA 2 VR Hub' – Road to VR
Dota 2 releases full VR spectator suite—just in time for the International | Ars Technica
Inside the 'DOTA 2 VR Hub' – Road to VR
Видео Dota 2 - Dota VR Hub - режим наблюдателя для ВР
Valve Adds VR Spectator Mode to 'DOTA 2' International Championships
This super-cool DOTA 2 VR demo video has me believing - CNET
Spectating Dota 2 in VR is amazing, watch it in action - Polygon
Valve opens up VR Hub for Dota 2 - The Reimaru Files
Inside the 'DOTA 2 VR Hub' – Road to VR
DOTA 2 International Main Event Will Be Livestreamed Today In VR
Dota 2 VR Hub is the Future of Watching eSports - VRScout
Dota VR Hub has been removed from the game : r/DotaPatches